Color facsimile receiver



Nov. 25, 1947. LA VERNE R. PHILPOTT 2,431,360

\ COLOR FACSIMILE RECEIVER Filed July 11, 1945 7 Sheets-Sheet 1 \INVENTQRS. L A VERA/57?. PH/L P07 7' ATTORNEYS.

Nov. 25, 1947. LA VERNE R. PHILPOTT 2,4

COLOR FACS IMILE RECEIVER Filed July 11, 1945 msheets-sheet 5 402 402 E I 275 27 I Fla, 3

INVENTORS.

BYLAl ERNE R. PH/L PUT T Nov. 25, 1947. LA VERNE R. PHILPOTT 2,431,360

COLOR FACSIMILE RECEIVER Filed July 11, 1945 7 Sheets-Sheet 5 INVENTORS. LA VERA/E R PH/LPOTT BY 1947- LAfi/ERNE R. PHILPOTT 2,431,360

COLOR FACS IMILE RECEIVER Filed July 11, 1945 7 Sheets-Sheet 6 INVENTORS.

\ BY L A VERNE R. PH/LPOT 7' ATTORNEYS.

Patented Nov. 25, 1947 UNITED STATES PATENT OFFICE COLOR FACSIMILE RECEIVER Application July 11, 1945, Serial No. 604,379

28 Claims.

My present invention relates to facsimile receivers, and more particularly to a facsimile receiver using a plurality of colored pencils to record a colored image on the recording sheet fastened around the drum of the facsimile receiver.

Essentially my invention utilizes the basic principle of a recording pencil as disclosed in the application of La Verne R. Philpott for Facsimile recording systems, Serial No. 567,022, filed December 7, 1944.

In the present case, however, the apparatus is specifically adapted for the recording of a plurality of colors with means for distinguishing among the various recording media in order to predetermine the particular color which is to be recorded at any instant.

Heretofore in the transmission of color pictures by facsimile, it has been necessary to separate the colors of the transmitted image at each specific area into its elemental colors. This has commonly been done by the rotation of a disk in front of the optical system of the transmitting mechanism, the said disk having various color filtering elements.

As shown in Patent Nos. 2,185,806 and 2,177,247, the signals received successively through the color filters were then transmitted and received on a recording device or plurality of recording devices adapted to form color separation negatives, that is, each elemental color was recorded on a separate negative and then the three or more negatives, or the prints therefrom, were laid together to form a composite picture.

A specific object of my invention is the direct recording of a color picture at a facsimile receiver on a single recording sheet.

Another object of my invention is the formation of a color facsimile record by a receiver, which record requires no further processing of any kind in order to be usable as a color picture. Another object of my invention is the utilization of a plurality of colored pencils or markers at a facsimile receiver in order to form a color facsimile thereat.

These and many other objects of my invention will become apparent in the following description and drawings in which Figure 1 is a general view partly broken away of my novel facsimile recorder.

Figure 2 is a cross-sectional View showing the operation of one of the recording units or pencil motors of Figure 1.

Figure 3 is an exploded view of a portion of the lead feed mechanism of Figure 2.

Figure 4 is an exploded view of another portion of the lead feed mechanism which cooperates with the members of Figure 3.

Figure 5 is a cross-sectional view showing the detailed operation of the lower portion of the recorder of Figure 1.

Figure 6 is a side view of the armature Shell 279 of the printing motor of Figure 2 showing the suspension means therefor.

Figure 7 is an end view taken from line 7-! of Figure 6. a

Figure 8 is a top view of the printing motors assembly taken from line 8-8 of Figure 1.

Figure 9 is a top view partly in cross-section of a paper feed device adapted for the present invention.

Figure 10 is a cross-sectional view of the drum 1 l of Figure 1 showing the paper clamp and operation thereof. I

Figure 11 is a schematic View showing the operation of the control mechanism.

Referring now to Figure 1, the facsimile recorder ll] comprises a picture carrying drum ll around which is fastened a plain white recording sheet, the fastening being accomplished in a maner specifically hereinafter described.

For optimum operation, the drum II is driven vertically in order to prevent variations in the pressure of the color pencils due to gravity which might possibly occur were the drum driven horizontally. The drum H is driven longitudinally of its axis by the screw thread 12 and is prevented from rotating during printing by the concentric splined shaft 13 cooperating with the splined nut 14 extending upwardly from the drum l l and down through the center of screw l2. Gear at is fastened to the bottom of the splined shaft 13 and, as seen in Figure 5, meshes with the spring loaded gear segment (see also Figure 5) which is rotatably mounted on the post 22.

The gear segment 95 is biased by tension spring 23 so that the stop 24 extending from the lower face of gear 95 is moved into eng With the stationary stop 25. Accordingly the gear 20 normally-held fixed by gear'95 and. the bias 3 spring 23 and stops 24 and 25 which co-act therewith.

Gear 26, as noted above, is connected to the lower end of the splined shaft I3 which end of the shaft extends concentrically through a longitudinal opening in the threaded shaft l2. Thus, as the drum I I is moved vertically upward by rotation of the threaded shaft l2, the near side of shaft 12 moving toward the right with respect to Figure 1, the splined shaft 13 is held stationary by the engagement of its gear 25 with the stopped gear 95, which in turn is held in place as above described by spring 23 and stops 24 and 25.

As will be clear, at the initiation of the operation of recording, drum II is at the bottom of cylinder 33 with the upper end 3| of the drum ll being located substantially in the area of the pencil motors 32, 32. Recording thus starts at the area 3] of drum H and as the drum H is moved upwardly without rotation thereof, the.

rotation of motors 32, 32 thereabout results in helical scanning. The cylinder 33 is rotatably mounted on thrust bearing 33 so that it is free to rotate with respect to the drum II and is driven from shaft of motor 50, which shaft is connected by a suitable gear to gear 30a mounted on the neck of cylinder 30.

At its upper end the rotatable cylinder 33 carries an annular horizontal plate 36 which carries the pencil motors 32, 32. An upper stationary cylinder 35 is provided secured in any suitable manner as by bolts 38,. 38, to the main frame or housing 43 of the receiver ID. The said cylinder 35 serves to protect the drum H as it moves upwardly during recording.

Preferably plate 36 carries four printing motors 32, carrying respectively red, yellow, blue and black colored pencil leads, each lead being about .037" in diameter and about 4" long. Each motor is so aligned with respect to the other motors that as the cylinder 30 rotates, its mark is superimposed upon that made by the motor immediately ahead of it with the exception of one. Each pencil is stepped up one quarter of the pitch so that as the drum moves up, the lines are superimposed.

An alternative arrangement may be used where all the pencil motors were aligned so that their axes all lay in the same equatorial plane about the axis of cylinder I! so that no color would superimpose upon another, but lay side by side on separate interleaved helices upon the record as cylinder H moves continuously upward. This method may, however, require the use of a different system of recording primary colors than that imposed by the direct superposition of pigments. This modified system of color deposition may, however, reduce the color smearing since each color prints on unmarked paper rather than partly on a location at which another color had been previously placed.

My device may also be adjusted so that the successive colors partially overlap. After a cycle of printing of all the color in succession, the drum has advanced one pitch in printing. In this case all pencils will be in the same equatorial plane.

Each motor 32 operates in a manner described in the above mentioned application Serial No. 567,022. Each motor is provided with armature means hereinafter more specifically described for causing its pencil to move into greater or lesser pressure engagement with the sheet in accordance with the received impulses. These armatures are connected respectively through the four slip rings 263 (Figure 2) either by wire or by an appropriate radio circuit to an amplifier in a transmitter of the type generally described in Patent No. 2,177,247.

In the transmitter, however, the printing motor is replaced by an optical system and photoelectric cell pick-up device conventionally designed. Scanning is done at the transmitter by a minute circle of light at each position so that the photocell which responds for any color is illuminated by a complementary color. In this manner the failure of illumination in the complementary color means absorption of light by the desired color which is momentarily under the view of the scanning spot. The degree of failure of this supplementary color causes the printing motor for that color to print at the recorder. Thus, if an area being scanned is white, both the desired and supplementary colors will be present and the receiver motor does not print, and that particular area at the receiver will be left white.

The pick-up at the transmitter for black might be actuated not by white light but by a combination of the lighter or warmer colors such as red and yellow, so that no black is printed until a dark shade presents itself.

The specific operation of the printing motor will be hereinafter described.

As the cylinder 30 rotates, the drum H is rising so as to make about one hundred printed lines to the inch. This value is adjustable by the stop screw H5 of Figure 5 as hereinafter pointed out.

In Figure 5, taken in connection with Figure 1, I have shown the mechanism for efiecting in a simple manner the desired motions of the drum H. The driving motor 50 operates the drive shaft 5! in any suitable manner and through any suitable gear reduction that may be required for the specific purpose. Drive shaft 5| is connected to gear 33a to drive cylinder 35 as above described.

Drive shaft 5] is also connected in any suitable manner as by the gear box 53 to the shaft 54 which is driven at reduced speed. Shaft 54 drives the gear 56 through the speed and direction changing mechanism 57. As seen in Figure 5, shaft 54 is connected to and drives the disk 63 within the housing 6| of the speed and direction changing mechanism 51. The disk 65 is pressed against the ball 63 by the spring washer 62 and the ball 53 is hence driven against the rotatable cylinder 64, which rotates in bearings 65, 65 in the housing 6|. Suitable power transmitting pressure is obtained between disk 66, ball 33 and cylinder 64 by mounting the disk 55 rigidly to shaft 54 and placing spring washer 32 between the rear wall of the housing 6! and a suitable thrust bearing H at the back of the disk GD. Shaft 54 has sufficient freedom of end motion in housing 6| to permit pressure being applied to ball 63.

The drive 57 is thus of the type in which the shaft 54 drives the cylinder 64 at a speed and direction depending on the position of the ball 63 between the disk Eli and the cylinder 64. If the diameter of ball 63 is aligned with the axis of shaft 54, the ratio of the gear is effectively infinite and cylinder 64 does not rotate. If the ball 53 is above the axis of shaft 54, then the gear 58 which is connected to the threaded shaft 12 is driven so as to raise the drum H; and if the ball 63 is below the aXis of shaft 54 then the driven gear 56 connected to the threaded shaft I2 is rotated to lower the drum II.

It will be clear from Figure 5 that the driven cylinder 64 is connected by gear 12 and idler I3 to the driven gear 56 secured to the threaded shaft I2. The ball 63 is constrained Within the roller centering yoke I5 which is arranged to move the ball along the surface of the drum 64 parallel to its aXis. Yoke 15 has a lower extension IS with a threaded end 'I'I carrying upper lock nuts I8 and lower lock nuts I9 for the purposes hereinafter described, and a tension spring 80 biasing the yoke downwardly. The yoke I5 also has an upper extension 33 connected to the control device I34.

Electrically operated solenoids I00, IOI, I62 and I03 control the positioning of the ball 63 of the variable speed and direction changing device 51 through the cross tree II and the whiflle trees I05, I00. Solenoids I02 and I03 having a reduced stroke set the drive for slow speed which includes the printing rate. The adjusting shaft H adjusts the final position of plunger I22 of solenoid I532 to adjust the number of lines per inch which the machine prints. Adjusting screws Iiiiia, I001) and I000 are provided respectively for solenoids.

I00, Iiil and I03. These screws are adjusted at the factory and require no further adjustment.

The operation of each solenoid for each function is described in connection with Figure 11.

If either the plunger I20 of solenoid I00 or the plunger I 2! of solenoid I III (but not both) is retracted at the same time as either plunger I22 of solenoid IIIZ or plunger I23 of solenoid I03 (but not both), the mechanism is adjusted to be in neutral. Picking up one more plunger, say plunger I22, results in causing the drum II to rise slowly. At the end of the printing cycle, solenoid Ito is operated to raise plunger I20 forcing drum II to move to the end of its scanning movement very rapidly. Also, solenoid I02 is de-energized dropping plunger I22. This is done by transmitting to the printer from the transmitter a tone signal especially intended to pick up the plunger I 20 and drop plunger I22 at the will of the transmitting operator. Stops H9 limit the downward movement of each plunger. Plungers I20 and I22 are slotted at I20a and I22a to permit cross trees I05 and I06 to operate over the prescribed stroke without binding.

The means for actuating the plungers and the control mechanism therefor, as well as the specific operations of the plungers for each step, is hereinafter described.

When the drum II reaches the extreme end of its stroke, the nut I30 at its lower end (see Figure 1 as well as Figure 5) binds at the expanded end Ida of the splined shaft I3 inside the drum II and rotates the splined shaft I3. As will be clear from Figures 1 and 5, splined shaft I3 has a lower extension Idb of narrower width than the splined shaft I 3 and extending through a longitudinal opening in the threaded shaft I2, and the lower bearing I2a of the threaded shaft I 2 and through gear 56 to the gear 20.

Consequently when the nut I 3! binds on the expanded end Ida of the splined shaft I 3, it rotates the splined shaft I3 and its extension I3b to rotate the gear 20 at the lower end and thus to rotate the gear 95 against the bias of the tension spring 23. Stops 24 and 25 separate, thus opening solenoid I 0! thus returning the drive mecha nism ratio 51 to slow speed to complete the one more turn necessary to unload the paper on drum II. At the completion of this turn, solenoid I02 is de-energized, dropping plunger I22 to return the mechanism 51 to neutral. This rotation of drum I I results in releasing the clamp on the paper wound on the drum II substantially in the manner hereinafter described and discharging the paper through the slot I in the upper cylinder 35 into the paper receiving magazine I 36 of Figure 9. A feed-out roller It serves to draw the paper out rapidly from the cylinder 35 into the magazine I36.

A new sheet may then be fed into the clamp slot and means may then be provided such as passing the new sheet between a pair of normally closed pilot contacts to de-energize the solenoid I03 as the sheet enters the drum. De-energization of solenoid I03, Figure 5, releases the plunger I23 permitting the right-hand end of the whiflle tree I055 to drop and thus permitting the cross tree Iii; to drop so that the ball 63 drops slightly below center to slowly rotate the drum II while it is at the upper end of its travel with the nut I355 caught on the splined shaft I3 and to slowly feed the new sheet of paper around the drum II.

At the completion of one such reverse rotation of the drum II, stops 24 and 25 engage and solenoid IIiI would be energized once more to lift the armature I2I were it not for the fact that the paper now loaded on the drum has passed out from between the pilot contacts, thus energizing solenoid I03 and lifting plunger I23, in the manner described in connection with Figure 11.

This drops the left-hand end of the cross tree Iill to a lower position (since armatures I20 and I2! have a longer stroke than armatures I22 and I23) and causes a continuin reverse, very rapid rotation of drum I I to lower it quickly to its lowermost position. As the drum II approaches the lower end of its travel, nut I4 binds on the shoulder 13a of the splined shaft I3 andsince the splined shaft I3 is now notable to rotate in that direction owing to the engagement of stops 2'4 and 25, the not It carries the splined shaft bodily downward thus forcing ball 63 into its neutral position limiting its travel.

The mechanism which forces the ball 63 up into its neutral position comprises the arm I40 pivotally mounted on the stationary pin IdI and having a yoke I 52 engaging around the lower end I31) of the shaft I3 between the gear 22 secured thereto and the collar I44. The shaft Ill-I31) is ordinarily biased in an upward position by the compression spring I45. Consequently any vertical movement of the shaft I3--I3b will result in rotation of the arm M0 around its pivot MI. The arm I40 has, at its end opposite the yoke I42, another yoke I engaging around the threaded extension I. under the lock nuts I8 (Figure 5). Consequently when the shaft I3-I3b is forced down, the underface of gear 20 will force down yoke I 42 of arm Hit thereby raising the yoke I50 pushing up against the lock nut IS on the extension Iii of the yoke I5 which carries the ball 63 and will thus restore the ball 63 to neutral position thereby stopping the motion of the drum II.

Arm M0 is provided with extension I3! having an opening through which link I38 passes terminating in head I381). Link I38 is slidably supported in member Iela and has an upward extension I39 disposed in the path of movement of member 95. On rotation of gear as resultin in rotation of gear segment member 95, the side of member will strike extension I39 drawing link I38 to the left and rotating arm I40 counterclockwise to move end I50 thereof down against nut I9. This will draw down yoke I5 and replace ball 63 at the neutral position to stop rotation of the drum H at exactly the right angular position for feed out and reloading of paper.

The tension of spring 80 and the force of magnets ltiil03 are such that a force operating on the yoke I50 of arm I40 through the adjusting nuts 18 and 19 will re-center the ball 63 through either side with quick facility. As above pointed out, the hollow cylinder or drum 35 is stationary and slotted lengthwise at I35 to eject and load the sheets on the drum I l.

The shell 30 rotates continuously and is synchronized and phased in the manner shown in application Serial No. 567,022. The printing motors 32, as above described, are carried on the annular disc 35 (Figures 1 and 2) which is secured in any suitable manner to the rotating cylinder 30. The rotating cylinder 30 is steadied at its upper end by rollers 300 on plate 223 bearing against ring 30d on the cylinder 30. Each printing motor as seen in Figure 2 is provided with a pair of stationary bearing plates 209, 20! secured in any suitable manner as by the bolts 202, 203 to the plate 35. The entire printing motor casing 205 comprises a cylindrical wall having the end plates 20S and 201, the said casing 205-206-267 being rotatably mounted in appropriate hearings in the stationary plates 290-20i.

The front plate 20'! of the rotatable housing has secured thereto in any suitable manner, as for instance by the bolts 2) and 2| l, the circular gear 2|5. The gear extends through the slot 2H3 in plate 35 and meshes with the stationary annular rack 2 l8 on the stationary annular platform 220 secured in any suitable manner to the main housing 30. Consequently as the rotatable cylinder 35 and the plate 36 rotates, the engagemerit of gear 255 with the stationary rack 2l8 results in constant rotation of the printing motor casing 205 and its end plates 200 and 28?.

The armature assembly which actuates the pencil 230 in cooperation with the paper on the recording drum H is shown more specifically in the expanded views of Figures 3 and 4, which views must be taken together with Figure 2.

The actuating mechanism comprises a stationary magnet core shell 235, the rear end of which is turned down and threaded at 236 and is further turned down at 231. The threaded portion 238 of the magnet core 235 is secured in the tapped opening 239 of the rear plate 256 of the rotatable motor casing. The tubular extension 23! extends out beyond the rear end of the plate 205. A compression spring 240 is mounted over the end of the tubular extension 23'! of magnet core 235 and a heel bearing 2M is mounted over the said tubular member 23'! bearing against spring 200.

A lead re-set clamp pull bushing 242 is also mounted over the end of the tubular extension 23? and is press-fit into the larger opening 241a of the heel bearing 24!, and is maintained in angular alignment with member 235 by the key 2520; extending inwardly from the interior of member 252 and engaging with the keyway 23in; in member 231. The pencil clamp member or the lead re-set clamp core 258 is threaded at its rear end at 25i and is received in the tapped opening 252 of the bushing 2 12. A lock nut 253 may be secured to the portion of the threaded end 25! which projects rearwardly of the tapped opening 252.

The heel bearing 24! is received in the counterbore recess 255 of the lead re-set gear 258, the said lead re-set gear 255 having a threaded stub shaft 251 which is received in the tapped opening 258 of the plate 200.

Thus, the entire pencil motor and its casin rotates with respect to the plate 200 by reason of the fact that the rearwardly projecting portion 251 of the lead clamp 250 is held by the member 242 which rides in the bearing 24]. Annular slip rings 260 are secured to the back plate 206 of the casing being spaced therefrom by the insu lating slip ring washer 26 l.

One of the slip rings 260 on each motor is connected to ground. A suitable brush connection between the other slip ring 260 is made to one of the circular slip rings 263 on the rotating cylinder 30 and current is led to the specific circular slip ring 263 from the stationary brush assembly 264. A slip ring 263 and brush 254 is provided for each of the four pencil motors.

The driving coil 215 which is energized in accordance with the variations in the particular color being recorded by the specific pencil motor and which is accordingly connected to the slip ring 280, is Wound around the driving coil shell 2T0. Shell 210 has openings 2102) to decrease its weight. The said driving coil shell 210 is mounted on and encases the magnet core 235. The front plate 201 is provided with an opening 212 which receives the front end 2'13 of the magnet core. Plate 207 is thus one pole of the magnet and end 213 of core 235 is the other pole of the magnet.

The coil 2T5 wound around the shell 210 is wound in the groove 215a (see also Figure l) and variations in the energization of the coil at 215 result in corresponding motion of the armature or coil-carrying shell 210 resulting in variation of pressure of the pencil 230 on the sheet on the recording drum H.

The rotatable cylinder 30 is carried u at 30c above the level of the annular rotatable plate 35 and almost up to abutment with the stationary cylinder 35 to protect the sheet on the drum H from dust. An opening 306 may be provided in the sleeve or extension 30a to permit the pencil 230 to project therethrough into engagement with the sheet on cylinder ll. Small areas between holes 305 may be cut away to permit visual observation of the character of recording; and suitable openings 40a in outer housing 40 may be provided for this purpose. These openings may he filled with transparent material, if desired.

The pencil 230 is so arranged that on pressure of varying degrees toward the sheet on the drum i i, it will make marks of varying degrees of shading-the greatest pressure producing the darkest mark and lighter pressure producing intermediate shading.

Normally the pencil 230 is held by the armature shell 210 and its associated elements, so that it is just barely in engagement with the sheet on the recording drum II but with insufiicient pressure to mark the same.

Assuming that the pencil of the particular pencil motor of Figure 2 is colored red, then whenever a signal is received for a particular shade or red at the transmitter, the pencil 23*] will be forced toward the paper at that instant with a degree of pressure corresponding to the energy of the signal received which in turn corresponds to the darkness of the red at the transmitter. By superimposing red, blue and yellow colored pencil marks on top of each other, a correct reproduction of the particular colors at the trans. mitter may be obtained.

The fourth black pencil will serve to receive and record from dark markings or black outlinings which may not be recording with proper blackness by the super-position of the red, blue and yellow. The black adds depth to the picture and makes the contrast greater.

Obviously, as above described, when a white area is being transmitted, no energy will be received on any of the pencil motors and none of the pencils will be urged toward the paper.

The front of the pencil motor casing is provided with a conical housing 230 having an extension 23I riding in the bearing 292 supported by the front stationary support 20I so that the entire pencil motor casing rotates on the elements 29I and 242 in the respective opposite bearings 292 and 2.

The lead nose clamp core 3I0 (Figure 4) is held in the bushing 3I5, the neck 3I6 of which projects through the tubular extension 3II of the shell 210.

The pencil clamp which integrates the pencil 230 with the armature shell 210 comprises a tube 250 having a flared forward end 320 which is received in the socket 302 having the flared opening 30L The socket 302 is secured in any suitable manner in the recess 303 of the magnet core 235.

Ledge 322 of bushing 3| 5 bears against the flange 236 of the shell 210. Surface 3I8 of bushing 3I5 bears against the inside of tubular extension 3I'I; and the right hand end of tubular extension 3I'I (Figure 4) is spun over the right end of surface 3 I 8 to hold bushing 3 I 5 in place.

The end 325 of split nose clamp 3I0 is even with the left end of bushing 3 I 5. The nose clamp 3I0 is split so that when the parts are allowed to separate, the pencil may slide readily with respect thereto but when they are held tightly together, the pencil is eiTectively clamped with respect thereto.

Spring 3II provides initial clamping pressure; the dimensioning of bushing 3I5 and clamp 3I0 furnishes the remainder of the pressure as needed. The clamping pressure of spring 3 is obtained by reason of the fact that spring 3II bears against the ledge 325 of the clamping nose EH6 on one end and against the ledge 330 of the bushing 3I5 at its front end. This drives the flared end of clamp 3I0 into the flared end of extension 3I6 of bushing 3I5 and causes the clamp 3 l 6 to engage pencil 230.

For ordinary recording and in order to maintain the pencil 230 sufiiciently sharp, the pencil motor casing 205 containing all of the pencil motor elements revolves continuously on its own axis as it is whirled by the plate 36 around the axis of the drum I I.

When by reason of this continuous sharpening, the pencil 230 is shortened somewhat, then rotation of gear 256 in an appropriate direction will serve to re-set the pencil. This rotation need only be for a fraction of a turn of the gear 256.

It will be seen that when the gear 256 is thus rotated, the threaded end 25'! thereof by reason of its engagement with threaded opening 258 of the plate 200 will move outwardly. The guide 256 is pulled to the left with respect to Figures 2 and 3, thus squeezing the flared end 300 into the insert 302. This pinches the segments of the pin vise arrangement 300 on to the lead which is inside it. Thus locked, the lead cannot move either to the right or to the left.

A sharp passage of reverse current is then passed through coil 215 which forces the shell 210 to the left. The friction of the lead and the split vise 3I0 tends to prevent the split vise 3I0 from moving to the left with the pencil lead 230. The relative motion between the split vise SH! and member 3I6 then relieves the pinching action of the two halves of the split vise 3I0 on the lead by reason of the action of spring (H I and the flared end of member 3I0; so that When the shell 210 moves, it slides the segments 3I0 along the clamped lead until it strikes its mechanical stop against the end plate 206. When it stops, the current is interrupted; the vise 3I0 is at a new location on the lead. The gear 256 i returned to its original position releasing the vise 250-330 and permitting printing to resume.

. The means for operating the gear 256 is shown schematically in Figure 8 wherein each motor 32 has associated therewith on the plate 36 alongside the motor a magnet I50 having the plunger I 5I. Plunger I 5I is pivotally connected at I52 to the link I53 which is pivotally mounted on the pivot I54. Link I53 i provided with a slot I55 engaging a pin I56 on the rack I51 which is in engagement with the underside of the gear 256.

A compression spring I60 connected at one end to the rack I 57 and at the other end to a stationary lug IBI on the plate 36biases the rack to the left with respect to the bottom motor of Figure 8.

When the magnets I50 of each of the motors is energized, these magnets attract the armature or plunger I5I and rotate the link I53 to drive the rack in a direction to compress the spring. This results in rotation of the gear 256. When the magnet I50 is de-energized, the compression spring I60 drives the elements back to the position shown.

Magnets I50 may be energized from a suitable slip-ring and brush arrangement and may be simultaneously energized from a single connection, or ifdesired, they may be arranged to be individually energized.

The rack I5I may be mounted in any suitable support, as for instance the supporting member I65 shown in Figure 2. Supporting member I65 may be mounted on the back plate 200 as shown, or on the base plate 36. The magnet I50 is, however, mounted on the annular base plate 36.

The magnets I50 may be energized from time to time either by the receiver operator to re-set the pencils in accordance with visual observation, or a switch may be closed at the end or top of movement of drum II to energize the magnets momentarily at the completion of recording, or the magnets may be energized pursuant to an appropriate signal received from the transmitter. Likewise, appropriate switches may be arranged operating at the same angular position as the paper clamp hereinafter described to successively energize and de-energize the magnets as they pass the margin so that the pencil re-set occurs in the margin.

I have found that even when solidly recording a particular color through an entire scanning operation, the pencil is not worn down sufficiently to interfere seriously with recording and accordingly 2. re-setting operation for the pencil at the completion of each picture is generally suflicient.

In Figures 6 and 7 we have shown a pantograph mounting supporting the armature shell 210 so that it will always be supported and need not slide frictionally on the magnet core 235 while at the same time it may move rectilinearly. The back plate 256 of the printing motor is provided with a plurality of studs 40?) projecting normally thereto toward the front of the printing motor and with a plurality of hinge carrying studs lfil also extending normally thereto. Each of the studs 40! carries hingedly connected thereto two pantograph arms #52.

Each pantograph arm 432 is hingedly connected at 455 to the armature shell 27%]. All of this is apparent from an inspection of Figure '7. As shown in Figure 6, the pantograph arm 352 is supported from each of the studs 40I at a point adjacent the back plate 205 and at a point near the forward end or the armature shell 213. Consequently the armature shell is free to move rectilinearly pursuant to received impulses.

The springs EI'I are connected front and back between each stud 45D and the pantograph arms 402. These springs serve to keep the pins of pantograph arms 402 in contact with small recesses or openings in shell 2') and stud 40! as the armature shell is moved back and forth swinging the arms 562 back and forth. y

In Figure 8 we have shown a top view taken along lines 88 of Figure 1 looking in the direction of the arrows and showing the various printing motor assemblies mounted on the rotatable annular plate 35. From this view it will be seen that the pencils 235 are arranged so that they are not radial of the drum II but rather so that they are at an angle to a tangent thereof so that the lead is off-set in the direction of rotation as described in said application Serial No. 567,022. The constant rotation of the printing motors 32 by the gears 2 I 5 thus results in continuous sharpening of the pencils 230 in the manner disclosed in the aforementioned application Serial No. 567,- 022. Thus, the pencils are continuously sharpening during scanning and at the conclusion of the scanning operation or at other intervals as above pointed out are re-set to compensate for any wear.

In Figure 9 we have shown a paper feed device arranged to cooperate with the drum II which in turn is more clearly shown in Figures 1 and 10. The drum II is shown end on in Figure 9 and in cross-section in Figure 10. It is provided with a clamp 550 which when it is in the position of'Figure 10 is perfectly continuous with the surface of the drum I I; but which may be raised as shown in Figure 9 to receive the sheet.

As seen in Figure 10, clamp 555 has secured thereto in an suitable manner a pair of bolts 552 preferably adjacent each end of the drum, which bolts are in turn connected to the slides 503, each. of the slides having a longitudinal oval opening 555 surrounding the splined shaft l3. A compression spring 558 surrounds each bolt and is compressed between the surface 599 of the slide 503 and the inner circumference of the drum II, thus biasing the clamp 505 into clamping position,

Ashaft 555 is carried between the ends'of the drums and the upper portion of this shaft 505 L5 provided externally of. the'en'd of the drum with the crank arm 596 (Figs. 1 and 8). Shaft 505 within the drum carries crank arms 55? keyed to the shaft in any suitable manner, said crank arms 5i)? bearing against the extensions sew of the slide 533. Rotation of crank 53% will rotate the shaft 555 to rotate the arms 55? against the extensions 557a of the slide 553 and drive the slide toward the perimeter of the drum (upwardly with respect to Figure 10) to move the clamp 585 out to disengaged position.

When the crank arm 505 is released, compression spring 508 will drive slide 553 back to the original position shown in Figure 10 res-engaging the clamp 50!).

A stationary pin 505a (Figure I.) mounted in the top of upper drum housing 35 will engage crank arm 586 when the drum II is rotated to discharge position and release the clamp. On initial return movement of drum II, the clamp closes. The clamp should be sufiiciently deep so that rotation of drum II to close the clamp will not cause the clamp to leave the edge of the paper before it engages the paper.

At the completion of the rise of the drum, the rotation of the drum II previously described (clockwise as indicated by the arrow 5I3 of Figure 9), feeds the edge of the sheet out through the slot I35 of the outer cylinder 35 and through the passage 5I5 to ,the delivery roll 525 which is a driven roll and idler I40 which feed the recorded sheet into the receiver tray I36. Idler is not driven to avoid smearing the recording. On completion of this clockwise rotation, members 506 and 558a cooperate to open the clamp 580 as previously pointed out.

At the completion of the delivery operation, feed roll 525 which was in an upper position on its arm 528a is lowered and is operated to lift the edge 52I of the sheet 522 from the stack 523. As soon as the edge MI is raised by the feed roll 52!] it snaps to the top side of the feed roll 523, feed roll 525 is raised, and the sheet is fed between the feed roll 52!] and the roll 525 up passage 526 until its leading edge enters beneath the clamp 53G. Passage 52B is widened to permit the paper to buckle since the drum II rotates back more slowly than the speed imparted to the sheet by rolls 52B525. The clamp is then dropped by lowering of slide 533 and on rotation of drum II once in the direction opposite to the arrow 553, the paper is wound around the drum II.

The drum II may then be dropped to repeat the scanning operation as previously described. The stack of paper 523 rests against the side member 536, the humped portion 53I of which is biased outwardly by compression spring 532 bearing against side wall 535a, and the upper sheet of the stack is confined in position by the flanges 533 and 534 so that the appropriate portion of the uppermost sheet ma be acted on by feed roll 525 while all of the sheets are retained in proper position by the side walls 536 and 531 of the housing.

A pair of pilot switch contacts 555 are provided in the passage 526. These contacts are separated by the paper as it moves up the passage and when separated start the drum II rotating to wind up the paper around the drum.

While we have described the operation of our device generally (in connection with Figure 5) as using four solenoids IDOjIIlI, I52 and IE3, actually solenoids I02 and IE3 are energized simultaneously for all purposes and thus may be connected in parallel to act together.

Or, preferably solenoid I03 may be omitted altogether and solenoid I52 may be spaced farther away from solenoids I50 and IOI by enough to double the length of the cross tree on its side. Thus, the plunger I2 2 of solenoid I02 may be connected directly to pin I 22a of cross tree III), and the length ofthe cross tree on that side of rod 83 may be double the length of the cross treeon the opposite side. The'forces applied to the ball yoke will thus'b'e equal for all magnets.

13 Referring to Figure 11, the sequence of operations of the plungers I20, I2 I, I22 therein shown (for solenoids I60, IBI, IE2 respectively) is as follows:

14 sheet into position to be loaded onto the drum. As the leading edge is about to enter the retaining slot in the drum, it passes between contacts 550 breaking their circuit.

Plunger Condition Sequence Operation Remarks Printing... D.. U U Unloading. U-.. U U PaperDischarge D U U Oompletionof4 D-.." U U Reloading D D D"...

ofdrum. CompletionofG... D-.-" D D"-.. Drum Reset D U..-" D..-.

Mechanism Stopped. Signgl from Transmitter.

o. Mechanism Stopped after one revolution of drum.

Mechanism Stopped. Entering Paper Initiates Operation of one reverse revolution Mechanism-Stopped.

The operation is as follows:

At sequence 1, the drum is in the downmost position with the mechanical stop holding it in the idling position. When an appropriate signal is received from the transmitting station, relay 505 is energized thus attracting its armature 605, and closing contacts 905, and I05. This closes the circuit through coils I02 and 502 (which are permanently connected in parallel), and lifting plunger I22. Relay 502 seals itself closed by attracting armature 692 and closing contacts 762, and 902 which parallel the connections closed by relay 505.

Relay 505 may now be de-energized without interrupting the operations which follow. During this phase of the operating cycle, contacts 550 have been closed. The consequence of this condition is to throw the speed changing and reversing device which will be referred to simply as the transmission into slow speed upward, the exact speed being determined by the adjustment of the adjustable plunger stop I I5 which controls the number of printed lines per inch of paper as already described.

After sufificient time has elapsed to have printed an entire page of material or at an earlier time at the discretion of the transmitter operator, a signal is transmitted to the printed to unload. This signal closes relay 504 by energizing its coil and attracting armature SM and closing contacts 904, and 104. This operation energizes solenoid I00 and relay 506a, which like relay 502 seals itself by attracting armature 600 to close contacts 900, and 100. At this time contacts 708 and 908 operated by gear segment 95 are also in contact having been closed at sequence 7.

The reception of the unload signal is sequence 3.

The consequence is that the transmission is thrown into high speed upward, which reduces the unloading time over that required had the drum continued to progress upward at the printing rate. When it has reached its most extreme top position, the advance screw I2 looks with the splined shaft I3 and rotates the drum II in such a direction to feed off the paper which is on it into the discharge magazine.

When drum II starts to rotate, contacts W3 and 908 separate de-energizing relay 500 and solenoid I00 and dropping the plunger IZQ. This returns the transmission to low speed. upward for the remainder of the drum revolution.

The opening of contacts I08 and 908 constitute sequence 4.

The completion of one turn of the drum II and the arresting of any further rotation by the mechanical stopping mechanism in the transmission is sequence 5. At this time the rollers 520- 525 in the paper storage magazine thread a new This is sequence 6.

It results in the de-energizing of solenoid IE2 and relay 502 in addition to solenoid l0! and relay 50!. Now all solenoids and relays are open and all plungers are down and the transmission is in high speed down. The drum quickly turns one revolution thus drawing around itself the new sheet of paper. When it has completed this turn the contacts 108 and 908 reclose as gear segment returns to its original position, and also prevents any further rotation of the drum. The lead screw I2 which must continue to rotate then proceeds to crank down the cylinder to its lower-most position in place to begin printing a new facsimile.

The reclosing of contacts 708 and $08 constitute sequence '7.

This event does not initiate any activity or alter any condition which already exists. When the drum reaches the end of its downward stroke, contacts W6 and 706 are closed by bridging contact 5080 when the mechanical neutralizing lever I 30 begins to come into play to stop the further travel.

This is sequence 8.

At this time relay 50I and solenoid IGI are energized and sealed by armature till and the closing of contacts it" and Bill. Plunger I2I is lifted thus throwing the transmission into slow speed down, which continues until the mechanical stop terminates the downward travel.

It is then in sequence 1 again until further notice.

A further simplification may be followed by eliminating solenoid Iii-I and relay 50I along with contacting mechanism 5060, thus relying completely on the mechanical stop to bring the device to rest at the lower limit. The remaining sequence would be unaltered. The cross tree H0 would again be fulcrummed at the center and whiifie trees I05 and I00 would not be needed.

In sequence 1 the transmission is in neutral. If it is left in that condition very long, excessive wear may take place at the center of the drive disc 0t. To prevent this, the spring washer I i may be replaced by a magnet which would work through the disc thrust bearing to be energized at sequence 2, would seal itself in, similar to relays 569 and 502, and be tie-energized at sequence 8 by a series contact similar to mechanism 5060 but inverted so as to be opened insteadof closed at sequence 8 as does 5060. This would also obviate the mechanical neutralizing device I40 on the transmission needed for the lower end of the drum stroke,

By means of the foregoing, it thus becomes possible to make an instantaneous recording of a color facsimile image without the necessity for complex photographic developing operations and accurate matching of color separation negatives. My facsimile receiver is entirely automatic in operation. The user need only load the paper magazine of Figure 9 and remove the completed facsimile sheet as it is delivered from the drum. He need perform no other operations with respect to the device.

Accordingly, my invention is adapted for use by the unskilled home user as well as by technical personnel but need not be put to the trouble of operating any of the mechanism or to the further trouble of developing and printing photographic separation negatives or positives and matching them up.

In the foregoing I have described my invention solely in connection with a specific illustrative embodiment thereof. Since many variations and modifications will now be obvious to those skilled in the art, I prefer to be bound not by the specific disclosures herein but only by the appended claims.

I claim:

1. In a facsimile receiver for recording a color image on a record sheet; means for supporting the record sheet; a plurality of record marking means; means for causing relative longitudinal movement between said record supporting means and said record marking means; means for causing relative rotational movement between said record supporting means and said record marking means; each of said record marking means including a marking member in engagement with the surface of the record sheet; and means for varying the pressure of each marking member in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet.

2. In a facsimile receiver for recording a color image on a record sheet; means for supporting the record sheet; a plurality of record marking means; means for causing relative longitudinal movement between said record supporting means and said record marking means; means for causing relative rotational movement between said record supporting means and said record marking means; each of said record marking means including a marking member in engagement with the surface of the record sheet; each marking member being adapted on variation of pressure to make a mark on the record sheet having a density corresponding to the pressure thereon and each marking member being adapted to make a mark of a color different from that of the other marking members; and means for varying the pressure of each marking member in accordance with variations in the elemental shading of the image being recorded.

3. In a facsimile receiver for recording a color image on a record sheet; means for supporting the record sheet; a plurality of record marking means; means for causing relative longitudinal movement between said record supporting means and said record marking means; means for causing relative rotational movement between said record supporting means and said record marking means; of said record marking means including a marking member in engagement with the surface of the record sheet; each marking member being adapted on variation of pressure to make a mark on the record sheet having a density corresponding to the pressure thereon and each marking member being adapted 'to makea mark of a color different from that of the other marking members; and means for 16 varying the pressure of each marking member in accordance with variations in the elemental shading in the image being recorded of the particular color which that marking member is adapted to record.

4. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; said record marking means being mounted on a rotatable member rotating in a plane normal to the axis of the drum; said drum being movable along its axis as the rotatable member rotates; each of said record marking means including a markin member in engageent with the surface of the record sheet; and means for varying the pressure of each marking member in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet.

5. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; said record marking means being mounted on a rotatable member rotating in a plane normal to the axis of the drum; said drum being movable along its axis as the rotatable member rotates; each of said record marking means including a marking member directed substantially toward the center of said rotatable member; said drum being positioned at the center of rotation of said rotatable member; each marking member engaging the surface of the record sheet; and means for varying the pressure of each marking member in accordance With variaticns in the elemental shading of the image being recorded to vary the density of the mark on the record sheet.

6. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; said record marking means being mounted on a rotatable member rotating in a plane normal to the axis of the drum; said drum being movable along its 26215 as the rotatable member rotates; each of said record marking means including a marking member directed substantially toward the center of said rotatable member; said drum being positioned at the center of rotation of said rotatable member; each marking member engaging the surface of the record sheet at an angle to a tangent of the drum; and means for varying the pressure of each marking member in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet.

'7. In a facsimile receiver for recording a color image on a record sheet; means for supporting the record sheet; a plurality of record marking means; means for causing relative longitudinal movement between said record supporting means and said record marking means; means for causing relative rotational movement between said record supporting means and said record marking means; each of said record marking means including a pencil in engagement with the surface of the record sheet; and means for varying the pressure of each pencil in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet.

8. In a facsimilereceiver for recording a color image on a record sheet; means for supporting the record sheet; a plurality of record marking means; means for causing relative longitudinal movement between said record supporting means and said record marking means; means for causing relative rotational movement between said record supporting means and said record marking means; each of said record marking means including a pencil in engagement with the surface of the record sheet; and means for varying the pressure of each pencil in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet, each record marking means carrying a pencil of a different color.

9. In a facsimile receiver for recording a color image on a record sheet; means for supporting the record sheet; at least three record marking means; means for causing relative longitudinal movement between said record supporting means and said record marking means; means for causing relative rotational movement between said record supporting means and said record marking means; each of said record marking means including a pencil in engagement with the surface of the record sheet; and means for varying the pressure of each pencil in accordance with Variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet, each record marking means carrying a pencil of a different color, the pencils for said record marking means being respectively red, blue and yellow in color.

10. In a facsimile receiver for recording a color image on a record sheet; means for supporting the record sheet; at least four record marking means; means for causing relative longitudinal movement between said record supporting means and said record marking means; means for causing relative rotational movement between said record supporting means and said record marking means; each of said record marking means including a pencil in engagement with the surface of the record sheet; and means for varying the pressure of each pencil in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet, each record marking means carrying a pencil of a different color, the pencils of said record marking means being respectively red, blue, yellow and black.

11. In a facsimile receiver for recording a color image on a record sheet; means for supporting the record sheet; a plurality of record marking means; means for causing relative longitudinal movement between said record supporting means and said record marking means; means for causing relative rotational movement between said record supporting means and said record marking means; each of said record marking means including a pencil in engagement with the surface of the record sheet; and means for varying the pressure of each pencil in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet, one of said pencils being black.

12. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; said record marking means being mounted on a rotatable member rotating in a plane normal to the axis of the drum; said drum being movable along its axis as the rotatable member rotates; each of said record marking means including a pencil in engagement with the surface of the record sheet; and means for varying the pressure of each pencil in accordance with variations in the elemental shading 18 of the image being recorded to vary the density of the mark on the record sheet, each record marking means carrying a pencil of a different color.

13. In a facisimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; said record marking means being mounted on a rotatable member rotating in a plane normal to the axis of the drum; said drum being movable along its axis as the rotatable member rotates; each of said record marking means including a pencil in engagement with the surface of the record sheet; means for varying the pressure of each pencil in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet, each record markin means carrying a pencil of a different color; and means operable on rotation of said rotatable member to continuously rotate said pencils on their respective aXes to sharpen the same.

14. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; said record marking means being mounted on a rotatable member rotating in a plane normal to the axis of the drum; said drum being movable along its axis as the rotatable member rotates; each of said record marking means including a pencil in engagement with the surface of the record sheet; means for varying the pressure of each pencil in accordance With variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet, each record marking means carrying a pencil of a diiferent color; means operable on rotation of said rotatable member to continuously rotate said pencils on their respective axes to sharpen the same; and means for periodically advancing each pencil toward the paper.

15. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; said record marking means being mounted on a rotatable member rotating in a plane normal to the axis of the drum; said drum being movable along its axis as the rotatable member rotates; each of said record marking means including a pencil in engagement with the surface of the record sheet; and means for varying the pressure of each pencil in accordance With variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet, each record marking means carrying a pencil of a different color, said last mentioned means including a rotatable mounting for each pencil on said rotatable member; a gear on said rotatable mounting; and a stationary gear meshin with said gear on said rotatable mounting.

16. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; said record marking means being mounted on a rotatable member rotating in a plane normal to the axis of the drum; said drum being movable along its axis as the rotatable member rotates; each of said record marking means including a pencil in engagement with the surface of the record sheet; means for varying the pressure of each pencil in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet, each record marking means carrying a pencil of a different color; means operable on rotation of said rotatable member to continuously rotate said pencils on their respective axes to sharpen the same; and means for periodically advancing each pencil toward the paper, said last mentioned means including a clamp for each pencil, a member operable on movement in one direction to release said clamp and advance said pencil and operable on return movement to reengage said clamp.

17. In a facsimile receiver for recording a color image on a record sheet; means for supporting the record sheet; a plurality of record marking means; means for causing relative longitudinal movement between said record supporting means and said record marking means; means for causing relative rotational movement between said record supporting means and said record marking means; each of said record marking means including a pencil in engagement with the surface of the record sheet; and means for varying the pressure of each pencil in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet, said last mentioned means including a magnet and armature individual to each pencil; a clamp connecting said pencil to said armature for movement therewith.

18. In a facsimile receiver for recording a color image on a record sheet; means for supporting the record sheet; a plurality of record marking means; means. for causin relative longitudinal movement between said record supporting means and said record marking means; means for causing relative rotational movement between said record supporting means and said record marking means; each of said record marking means including a pencil in engagement with the surface of the record sheet; means for varying the pressure of each pencil in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet, said last mentioned means including a magnet and armature individual to each pencil; a clamp connect-ing said pencil to said armature for movement therewith; and means for supporting said armature for free movement with respect to said magnet.

19. In a facsimile receiver for recording a color image on a record sheet; means for supporting the record sheet; a plurality of record marking means; means for causing relative longitudinal movement between said record supporting means and said record marking means; means for causing relative rotational movement between said record supporting means and said record marking means; each of said record marking means including a pencil in engagement with the surface of the record sheet; means for varying the pressure of each pencil in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet, said last mentioned means including a magnet and armature individual to each pencil; a clamp connecting said pencil to said armature for movement therewith; and pantobeing movable. along its axis as the rotatable member rotates; each of said record marking means including a marking member in engagement with the surface of the record sheet; means for varying the pressure of eachrmarking member in accordance with variations in the elemental. shading of the image being recorded to vary the density of the mark on the record sheet, and releasable. record sheet holding means on said drum.

21. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; said record marking meansv being mounted on a rotatable member rotating in a plane normal to the axis of the drum; said drum being movable along its axis as the rotatable member rotates; each of said record marking means including a marking member in engagement with the surface of the record sheet; means for varying the pressure of each marking member in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet; releasable record sheet holding means on said drum; and automatic control means for causing said drum to move a scanning speed in the scanning direction and at high speed in the reverse direction.

22. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; a rotatable member rotating in a plane normal to the axis of said drum, said record marking means being mounted on said rotatable member; said drum being movable along its axis as, said rotatable member rotates; each of. said record marking means including a marking member in engagement with the surface of the record sheet; means for varying the pressure of each marking member in accordance with variations in the elemental shading of the image being recorded; releasable record sheet holding means on said drum; and automatic control means for causing said drum to move at scanning speed in the scanning direction and at high speed in the reverse direction, said control means also causing said drum to rotate on its axis at the end of the scanning movement to discharge the record sheet and to rotate back prior to re-setting of the drum to wind another record sheet thereon.

23. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; a rotatable member rotating in a plane normal to the axis of said drum, said record marking means beingmounted on said rotatable member; said drum being movable along its axis as the rotatable member rotates; each of said record marking means including a marking member, in engagement with the surface of the record sheet; means for varying the pressure of each marking member in accordance with variations in the elemental shading of the image being recorded; releasable record sheet holding means on said drum; and automatic control means for causing said drum to move at scanning speed in the scanning direction and at high speed in the reverse direction, said control means also causing said drum to rotate on its axis at the end of the scanning movement to discharge the record sheet and to rotate back prior to re-setting of the drum to wind another record sheet thereon, said last mentioned operations being performed in response to movement of the drum to complete the scanning operation.

24. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; said record marking means being mounted on a rotatable member rotating in a plane normal to the axis of the drum; said drum being movable along its axis as the rotatable member rotates; each of said record marking means including a marking member in engagement with the surface of the record sheet; means for varying the pressure of each marking member in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet; a longitudinal screw for driving said drum; speed and direction changing mechanism connected to said screw.

25. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; said record marking means being mounted on a rotatable member rotating in a plane normal to the axis of the drum; said drum being movable along its axis as the rotatable member rotates; each of said record marking means including a marking member in engagement with the surface of the record sheet; means for varying the pressure of each marking member in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet; a longitudinal screw for driving said drum; speed and direction changing mechanism connected to said. screw; and automatic control means for causing said drum to move at scanning speed in the scanning direction and at high speed in the reverse direction.

26. In a facsimile receiver for recording a color image on a record sheet; a drum for supporting the record sheet; a plurality of recording marking means; said record marking means being mounted on a rotatable member rotating in a plane normal to the axis of the drum; said drum being movable along its axis as the rotatable member rotates; each of said record marking means including a marking member in engagement with the surface of the record sheet; means for varying the pressure or each marking member in accordance with variations in the elemental shading of the image being recorded to vary the density of the mark on the record sheet; a longitudinal screw for driving said drum; speed and direction changing mechanism connected to said screw; and means responsive to the position of said drum for controlling said speed and direction changing mechanism.

2'7. In a color facsimile receiver, a recording sheet, a plurality of pencils in engaging contact with the surface of said recording sheet, each of said pencils constructed to leave individual color impressions on said sheet when pressure is applied thereto, means for applying a relative movement between said pencils and said sheet, and means for varying the pressure applied to each of said pencils individually in accordance with a predetermined image to be reproduced.

28. In a color facsimile receiver, a recording sheet, a plurality of pencils in engaging contact with the surface of said recording sheet, each individual to a predetermined color, said pencils being angularly disposed with respect to each other in a plane at right angles to the axis of said drum and adjacent the outer circumference of said drum, each of said pencils constructed to leave individual color impressions on said sheet when pressure is applied thereto, means for applying a relative movement between said pencils and said sheet, and means for varying the pressure applied to each of said pencils individually in accordance with a predetermined image to be reproduced.

LA VERNE R. PHILPOTT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,709,926 Weaver Q Apr. 23, 1929 1,854,315 Schmook Apr. 19, 1932 2,085,093 Gauthier June 29, 1937 2,185,806 Finch Jan, 2, 1940 2,266,539 Finch Dec. 16, 1941 

